Hello there Shankar,
Always nice to hear from people interested in Roman archaeology & history. There are lectures in September & October, with exact details yet to be announced.
I highly recommend you sign up to the Classical Events mail list to receive updates – http://maillists.uwa.edu.au/mailman/listinfo/classical-events
Also if you become a member of the Roman Archaeology Group you will get emails with details of upcoming events. There is also a facebook page that shares RAG events as well as other things happening around Perth. https://www.facebook.com/UWACLAN .